/Engine/Source/Runtime/Engine/Classes/Components/InputComponent.h
Indicates that the InputComponent is interested in knowing/consuming an axis key's value (via GetAxisKeyValue) but does not want a delegate function called each frame. Returned reference is only guaranteed to be valid until another axis key is bound.
[FInputAxisKeyBinding](API\Runtime\Engine\Components\FInputAxisKeyBinding) & BindAxisKey ( const [FKey](API\Runtime\InputCore\FKey) AxisKey )